Type-writing machine.



P. G. ROBERTS. TYPE WRITING MACHINE.

APPLICATION FILED 11.27, 1912.

1,098,407. I Patented J11I1B2,1914.

WITNESSES:

INVENTUR:

ATTORNE COLUMBIA FLANOGRAPH c0., WASHINGTON, D. C

sirAtrEs:PATENtrroFnIoE.

FRANK ROBERTS, G15 PHILADELPHIA, FENNS'YLVANIA, ASSIGNQR TO 'UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAEVARE.

TYPE-WRITING MACHINE.

To all whom it may concern Be it known that l, FRANK C. ROBERTS, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Type 'Writing Machines, of which the fol lowing is a specification.

My invention relates to typewriting machines, and is herein illustrated as applied to an Underwood typewriting machine on which it is desired to write a duplicate copy at the same timethat an original is written.

Among the objects of my invention are to provide improved means for making a duplicate copy without obj ectionably smudging the sheet on which said duplicate is written, and to provide improved means for feeding paper around the platen. For making such a duplicate copy, there is employed in addition to the ordinary ink ribbon, a second ink ribbon, preferably in the form of an endless web, which passes around the platen and travels with the worksheet. The paper used in writing both copies is preferably a single piece, which is folded and then inserted so that one reach of the end less ribbon aforesaid is between the two flaps of the fold. TV hen the platen is then turned to feed the paper, the web grips the inner flap of the paper between it and the platen. This insures a line-feeding of the paper. It is desirable to employ additional feeding means. This is preferably a belt which passes around the platen. This belt is prefer ably of metal or similar rigid material and forms a side-edge guide for the folded worksheet. When used with the endless ink-web or ribbon above described, one reach of this metal belt preferably lies in the same plane as one reach of the endless web, so that in inserting a folded worksheet one flap may pass on each side of the reach of the belt, and the inner flap will then be seized between the belt and the platen in feeding the paper forward. Such a folded paper inserted with one flap on each side of the feeding belt may be pushed over till the fold strikes the belt. This will aline the paper. The feeding belt is preferably arranged to lie beyond the margin of the inking web, so that it cannot press the paper against the web, which pressure might smudge the paper. This feeding belt may take the place of the ordinary feed rolls and other paper feeding Specification of Letters Patent.

Application filed April 27, 1912. serial No. 693,514.

Patented J une 2, 1914.

devices and may be used with other forms of inking ribbons. The belt aids always in feeding the worksheet around the platen, especially when the bottom edge of the sheet is nearing the printing point. Moreover, where the belt is employed, the ink-web may not be tensioned so tightly, and hence may be less liable to smudge the worksheet. An apron may extend between the two reaches of the inking web, so as to keep the paper on the proper side of the platen. Preferably, means are employed for obtaining proper and constant tension on both inking web and belt. Other features and advan tages will hereinafter appear.

In the accompanying drawings, Figure 1 is a perspective front View of such parts of a typewriter as particularly relateto the present invention. Fig. 2 is a transverse sec tion of parts of the same.

A platen 1 rotatable by means of a hand wheel 2 is fast in a platen frame, comprising end pieces 3 and i. The axle 5 of said platen is embraced by a fork 6 at each end, comprising the bottoms of end pieces 7 of a frame about which a continuous inking web or ribbon 8 is carried. Said frame comprises also front and rear rods 9 and 10, about which the ribbon is carried; and these rods are at the same distance apart as the diameter of the platen so that the web 8 has its two reaches parallel. A guide rod 11 extends from one side piece to the other of said frame, and forms a tensioning member for said web 8, bein held outwardly by springs 12 which are limited in their eX- pension by means of screws 13 threaded into bosses i l on said end pieces '2'. Front rods 15 and a rear rod 16 rise from end members El and at of the platen frame to steady the end pieces 7, and diagonal rods 17 con nect the two end pieces 7 to give the frame firmness. Across said frame extends a shaft 18 on which is journaled a pulley 19, and around said pulley passes a belt preferably a metal strip 20 which encircles the platen. A tension device, comprising a pivoted arm 21, an idlepulley 22 and a spring 23, keeps a definite tension on said belt, so as to hold it constantly against the platen. Said tension device is so arranged that it may be swung to engage either the front or rear reach of said belt. Across said frame extends a fixed rod 2a to which is fast an apron 25 extending outward in both directions toward the web 8, so that as a folded paper 26 is inserted, the flap of the paper behind the web will be prevented from falling over across the platen. The paper is preferably first folded and then inserted with one flap on each side of'the belt 20 at the rear of the machine and moved over until the fold contacts with the reach of the belt 20. The edge of the belt 20 may serve as a guiding edge for alining the paper when it is put in. After the paper is inserted, the turning of the platen by the hand wheel 2 or by the line-space mechanism, (not shown) will grip the paper between the belt and the platen and feed it forward to the printing line at the front of the machine. Here the type 27 will strike the paper and write on it through the ordinary ribbon :28 carried in vibrator 29.

It will be observed that the web 8 need not cover the whole area of the sheet, but

only such portion as it is desired to write on; and the sides of the apron 25 also need extend only partly across the machine.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen, of means for rotating it, a belt passing around said platen to feed paper around the platen and of a width to engage the margin only of a work sheet, and a tension member to hold an extended length of said belt straight so that a folded paper may be placed about said belt and be fed around the platen.

2. In a typewriting maclnne, the combination with a platen, of means for rotating it, an ink ribbon traveling with the rotating platen, and an endless band located beyond the edge of the ink ribbon and forming a.

means to clamp paper to the platen and cause the paper to travel with said ribbon over said platen.

3. In typewriting machine, the combination with a platen, of means for rotating it, an ink ribbon traveling with the rotating platen, and an endless belt surrounding the platen, to hold the paper in position on the platen and feed the paper over the platen.

4:. In a typewriting machine, the combination with a platen, of means for rotating it, an end-less ink ribbon traveling with the rotating platen, a second ink ribbon, type arranged to impress characters on paper from each ribbon, and an endless band beyond said endless ribbon and surrounding the platen, said endless band cooperating with the platen to hold a work member on the platen and cause it to be fed over the platen with said first ribbon.

5. In a typewriting machine, the combination with a platen, of means for rotating it, an ink ribbon traveling with the rotating platen, a paper feeding belt surrounding and traveling with the platen and having a straight reach adjacent to and parallel with a reach of said ribbon, said belt arranged to engage a side edge of a worksheet which extends over the ribbon and hold the paper between the belt and platen as the paper is fed over the platen, and means holding said belt tensioned.

6. In a typewriting machine, the combination with a platen, of means for rotating it, an ink ribbon traveling with the rotating platen, a paper guiding belt traveling with the platen and having a reach adjacent to and parallel with a reach of said ribbon, and an apron between the reaches of said belt to guide paper placed around said belt.

7. In a typewriting machine, the combination with an inking ribbon and a platen, of means for feeding paper and said ribbon together in the same direction at the same speed, said paper feeding means arranged to contact with said paper wholly outside the area of paper covered by said ribbon.

8. In a typewriting machine, the combination with a platen, of a member at a distance from said platen, and a belt passing completely around said member and platen arranged to clamp paper between the belt and platen and thereby feed the paper around said platen, said belt being located outside the printing area of the paper.

9. In a typewriting machine, the combination with a platen, and a platen frame in which said platen is journaled, of a framework iiXed on said frame, a pulley journaled in said framework, a belt passing around said pulley and an end of the platen outside of the printing zone, and a belttightener bearing against one reach of said belt.

10. In a typewriting machine, the combination with a platen and platen frame in which said platen is journaled, of a framework fixed on said frame, a pulley journaled in said framework, a belt passing around said pulley and platen, and an apron spanning the distance between the reaches of said belt arranged to keep paper on the proper side of the platen.

11. In a typewriting machine, the combination with a platen and platen frame in which said platen is j ournaled, of a framework fixed on said frame, an inking web passing around said platen and a rod in said frame and having a straight reach, and a firm straight edge adjacent to and parallel with said straight reach, said straight edge serving as a guide in inserting paper.

12. In a typewriting machine, the combination with a platen and platen frame in which said platen is journaled, of a framework fixed on said frame, fixed guide rods on said framework, an inking web passing completely around said platen and guide rods, a pulley journaled in said framework, a belt passing around said pulley and said platen so that its reaches lie in the same plane as the reaches of the inking web, and an idle pulley arranged to swing against either reach of said belt to tension it.

13. I11 a typewriting machine, the combination with a platen and a platen frame in which it is journaled, of an upright rising from each end of said frame and having a fixed connection therewith, diagonal struts fixed to and rising from the front of each end of the platen frame, a diagonal strut fixed to and rising from the rear at one end of said frame, diagonal ties connecting said uprights, and a guiding member crossing said framework.

14. In a typewriting machine, the combination with a platen and a platen frame in which it is journaled, of a framework on said frame, a guide on said framework, an inking web arranged to pass around said platen and guide, and a tension member extending across the web and movable bodily in a direction to maintain tension on the web without varying the direction of the reach of said web between the platen and guide.

1%. In a typewriting machine, the combination with a platen frame and a platen journaled therein, of a framework fixed on said frame, fixed guide members on the framework, an endless inking web surrounding the platen and guide members, a pulley journaled in the framework, and a worksheet holding and feeding belt passing around. said pulley and platen with its reaches lying in the same plane as the reaches of the inking web, said belt forming a means to clamp the margin of a work-sheet between the belt and platen as the work-sheet is fed over the platen.

16. In a typewriting machine, the combination with a rotary platen, of a duplicating web and a work-holding strip both running over the platen with a work-piece, said strip engaging the work-piece outside of the area covered by said web.

17. In a typewriting machine, the combination with a rotary platen, of a duplicating web, said web to be guided over the platen between the leaves of a folded work-piece, and means to feed the work-piece over the platen, comprising a band over which the work-piece is folded, the band engaging the work-piece outside of the area covered by the duplicating web and holding the work piece against the platen.

18. In a typewriting machine, the combination with a rotary platen, of a ribbon extending over the printing line of the platen, means to support said ribbon and cause it to be fed with a work-piece over the platen, and a band running over the platen beyond the edge of the ribbon and forming a means to hold the work-piece against the platen and feed the work-piece forwardly over the printing line.

19. In a typewriting machine, the combination with a rotary platen, of an inking ribbon and a taut metal band running over the platen side by side, said band forming a means to engage within the fold of a folded worksheet and hold it against the platen, thereby causing the work-sheet to be fed forwardly over the platen as the latter is rotated.

FRANK C. ROBERTS. \Vitnesses ROBERT E. BAILEY, ANTHONY ("INELLI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

